/* 全局样式 */
:root {
    --primary-color: #FF7A00; /* 活力橙色 */
    --primary-light: #FFB370;
    --primary-dark: #CC6200;
    --secondary-color: #4A90E2;
    --text-color: #333333;
    --text-light: #666666;
    --background-color: #F5F5F5;
    --card-background: #FFFFFF;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    position: relative;
    min-height: 100vh;
    /* 调整英文与中文字符之间的字间距 */
    letter-spacing: 0.02em;
}

/* 确保英文使用 Inter 字体 */
:lang(en) {
    font-family: 'Inter', sans-serif;
}

/* 调整卡片中的文本间距 */
.paper-card h3,
.paper-card .journal,
.paper-card .description {
    letter-spacing: 0.02em;
}

/* 调整模态框中的文本间距 */
.modal-content {
    letter-spacing: 0.02em;
}

/* 调整表单元素中的文本间距 */
.form-group input,
.form-group select,
.form-group textarea {
    letter-spacing: 0.02em;
}

/* 调整返修意见中的文本间距 */
.revision-item .revision-content,
.revision-item .revision-category {
    letter-spacing: 0.02em;
}

/* 调整历史记录中的文本间距 */
.history-item .history-action {
    letter-spacing: 0.02em;
}

#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 20px;
}

.footer-text {
    color: #666666;
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}

/* 头部样式 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #E0E0E0;
}

.title-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.main-title {
    color: var(--primary-color);
    font-size: 3.5rem;
    margin: 0;
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 900;
    line-height: 1.2;
}

.sub-title {
    color: var(--text-light);
    font-size: 1.8rem;
    margin: 10px 0 0 0;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    letter-spacing: 1px;
}

/* 部分标题样式 */
.section-title {
    display: flex;
    flex-direction: column;
    margin-bottom: 25px;
    align-items: flex-start;
}

.section-main-title {
    color: var(--primary-color);
    font-size: 10rem;
    margin: 0;
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

.section-sub-title {
    color: var(--text-light);
    font-size: 1.5rem;
    margin: 0 0 0 0;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    letter-spacing: 1px;
}

/* 按钮样式 */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 2px 6px rgba(255, 122, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(255, 122, 0, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #E0E0E0 0%, #BDBDBD 100%);
    color: var(--text-color);
    border: none;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* 自定义按钮样式 */
.custom-btn {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.custom-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(255, 122, 0, 0.3);
}

.custom-btn.primary {
    background-color: var(--primary-color);
    color: white;
    border: 1px solid var(--primary-color);
}

.custom-btn.primary:hover {
    background-color: var(--primary-dark);
}

.custom-btn.secondary {
    background-color: #F5F5F5;
    color: var(--text-color);
    border: 1px solid #E0E0E0;
}

.custom-btn.secondary:hover {
    background-color: #E0E0E0;
}

/* 作者删除图标样式 */
.remove-author-btn {
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.remove-author-btn:hover {
    transform: scale(1.1);
    opacity: 0.8;
}

.remove-author-btn svg path {
    transition: stroke 0.2s ease;
}

.remove-author-btn:hover svg path {
    stroke: #B71C1C;
}

/* 删除按钮样式 */
.btn-delete {
    background-color: #D32F2F;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    position: absolute;
    bottom: 20px;
    right: 20px;
}

.btn-delete:hover {
    background-color: #B71C1C;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(211, 47, 47, 0.3);
}

/* 双栏布局 */
.papers-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 20px;
}

.papers-section {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 20px;
}

.papers-section h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* 网格布局 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
}

/* 响应式双栏布局 */
@media (max-width: 767px) {
    .papers-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (min-width: 768px) and (max-width: 1024px) {
    .papers-layout {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
}

/* 卡片样式 */
.paper-card {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 20px;
    cursor: pointer;
    transition: var(--transition);
    border-left: 4px solid transparent;
    background: linear-gradient(135deg, #ffffff 0%, #f9f9f9 100%);
}

.paper-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
    border-left: 4px solid var(--primary-color);
}

.paper-card h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
    color: var(--text-color);
}

.paper-card .authors {
    color: var(--text-light);
    margin-bottom: 10px;
    font-size: 0.9rem;
    font-weight: 500;
}

.paper-card .journal {
    color: var(--text-light);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.paper-card .status {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 10px;
}

/* 状态颜色 */
.status.研究开展 {
    background-color: #E3F2FD;
    color: #1976D2;
}

.status.初稿撰写 {
    background-color: #E8F5E9;
    color: #388E3C;
}

.status.投稿中 {
    background-color: #FFF3E0;
    color: #F57C00;
}

.status.返修中 {
    background-color: #FFFDE7;
    color: #FBC02D;
}

.status.被拒 {
    background-color: #FFEBEE;
    color: #D32F2F;
}

.status.收录 {
    background-color: #E8F5E9;
    color: #388E3C;
}

.status.见稿 {
    background-color: #E3F2FD;
    color: #1976D2;
}

.paper-card .description {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 10px;
    line-height: 1.4;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: var(--card-background);
    margin: 10% auto;
    padding: 30px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 600px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    position: relative;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-50px); }
    to { opacity: 1; transform: translateY(0); }
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    top: 15px;
    right: 20px;
}

.close:hover {
    color: var(--text-color);
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #E0E0E0;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(255, 122, 0, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 论文详情样式 */
#paper-details {
    margin-bottom: 30px;
}

.detail-item {
    margin-bottom: 15px;
}

.detail-item label {
    font-weight: 500;
    color: var(--text-light);
    display: block;
    margin-bottom: 5px;
}

.detail-item .value {
    font-size: 1.1rem;
    color: var(--text-color);
}

.status-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 10px;
}

/* 返修意见样式 */
.revision-item {
    background-color: #F9F9F9;
    border-radius: var(--border-radius);
    padding: 15px;
    margin-bottom: 15px;
    border-left: 4px solid var(--secondary-color);
}

.revision-item .revision-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    flex-wrap: wrap;
    gap: 10px;
}

.revision-item .revision-header > div {
    display: flex;
    align-items: center;
    gap: 10px;
}

.revision-item .revision-category {
    font-weight: 500;
    color: var(--secondary-color);
}

.revision-item .revision-date {
    font-size: 0.8rem;
    color: var(--text-light);
}

.revision-item .revision-content {
    margin-bottom: 10px;
    line-height: 1.5;
}

.revision-item .revision-checkbox {
    display: flex;
    align-items: center;
    margin-top: 10px;
}

.revision-item .revision-checkbox input[type="checkbox"] {
    margin-right: 10px;
    transform: scale(1.2);
}

.revision-item .revision-checkbox label {
    font-size: 0.9rem;
    color: var(--text-color);
}

/* 历史时间线样式 */
#history-timeline {
    position: relative;
    padding-left: 30px;
}

#history-timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: #E0E0E0;
}

.history-item {
    position: relative;
    margin-bottom: 20px;
    padding: 15px;
    background-color: #F9F9F9;
    border-radius: var(--border-radius);
}

.history-item::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 20px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 3px solid white;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.history-item .history-date {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 5px;
}

.history-item .history-action {
    font-size: 0.95rem;
    color: var(--text-color);
}

/* 响应式设计 */
@media (max-width: 767px) {
    .container {
        padding: 15px;
    }
    
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 15% auto;
        padding: 20px;
        width: 95%;
    }
    
    #history-timeline {
        padding-left: 20px;
    }
    
    .history-item::before {
        left: -20px;
    }
}

@media (min-width: 768px) and (max-width: 1024px) {
    .grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 工具类 */
.mt-4 {
    margin-top: 2rem;
}

/* 状态选择器样式 */
.status-selector {
    margin-top: 20px;
    padding: 15px;
    background-color: #f9f9f9;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

.status-selector label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-color);
}

.status-select {
    width: 100%;
    padding: 12px;
    border: 2px solid #E0E0E0;
    border-radius: var(--border-radius);
    font-size: 1rem;
    background-color: white;
    cursor: pointer;
    transition: var(--transition);
}

.status-select:hover {
    border-color: var(--primary-color);
}

.status-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 122, 0, 0.1);
}

/* 为状态选项添加背景颜色 */
.status-select option[data-status="研究开展"] {
    background-color: #E3F2FD;
    color: #1976D2;
}

.status-select option[data-status="初稿撰写"] {
    background-color: #E8F5E9;
    color: #388E3C;
}

.status-select option[data-status="投稿中"] {
    background-color: #FFF3E0;
    color: #F57C00;
}

.status-select option[data-status="返修中"] {
    background-color: #FFFDE7;
    color: #FBC02D;
}

.status-select option[data-status="被拒"] {
    background-color: #FFEBEE;
    color: #D32F2F;
}

.status-select option[data-status="收录"] {
    background-color: #E8F5E9;
    color: #388E3C;
}

.status-select option[data-status="见稿"] {
    background-color: #E3F2FD;
    color: #1976D2;
}

.status-select option[data-status="结束"] {
    background-color: #F5F5F5;
    color: #616161;
}